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Standards IEC 60947-1, IEC 60947-3, VDE 0660 Part 107
Disconnector Type 3KL50 3KL52 3KL53 3KL55 3KL57 3KL61 3KL62
3KM50 3KM52 3KM53 3KM55 3KM57
Rated continuous current I
u
A 63 125 160 250 400 630 800
for fuse links acc. to DIN 43620 Size 00
and 000 00 and 000 00 and 000 1 and 2 1 and 2 3 and 2 3 and 2
(when semiconductor protection fuse links
are used, the rated current must be reduced,
refer to the SITOR Catalog, Engineering
(order No. E20001–A700–P302)
Rated operating voltage U
e
50 Hz/60 Hz AC V 690
DC V 440 (3 conducting paths connected in series)
V 220 (2 conducting paths connected in series)
Rated short-circuit making capacity
with fuses
at 690 V AC 50Hz/60 Hz kA (peak value) 220 220 220 176 176 105 105
Rated short-circuit making capacity
with fuses
at 690 V AC 50Hz/60 Hz kA (peak value) 100 100 100 80 80 50 50
max. operating current I
n
of the fuses A 80 160 160 400 400 630 800
max. permissible power loss of the mounted fuse
NH W 6 9 11.5 32 45 48 62
BS W 8 (A2/A3) 11.5 (A4) 11.5 32 45 48 60.5
Permissible let-through current of the fuses kA 8 17 17 30 30 50 50
Max. permissible I
2
t let-through value kA
2
s 55 223 223 1000 1000 5400 10500
Rated conditional short-circuit current
with upstream fuses
at 690 V AC 50 Hz/60 Hz kA (RMS value) 50 50 50 40
Switching capacity (feed from either the top or bottom)
at AC 400 V
Breaking current I
c
(cos  = 0.35) A (RMS value) 500 1000 1280 2000 3200 5100 6400
Rated operating current I
e
at
AC-21A, AC-22A, AC-23A A 63 125 160 250 400 630 800
Motor switching capacity AC-23A kW 30 65 80 132 200 335 400
at AC 500 V
Breaking current I
c
(cos  = 0.35) A (RMS value) 500 1000 1280 2000 3200 5100 6400
Rated operating current I
e
at
AC-21A, AC-22A, AC-23A A 63 125 160 250 400 630 630
Motor switching capacity AC-23A kW 40 90 110 185 280 425 500
at AC 690 V
Breaking current I
c
(cos  = 0.35) A (RMS value) 500 1000 1280 2000 3200 5100 6400
Rated operating current I
e
at
AC-21A, AC-22A, AC-23A A 63 125 160 250 400 630 800
Motor switching capacity AC-23A kW 50 110 150 220 375 560 700
at DC 440 V (3 conducting paths connected in series)
Breaking current I
c
(L/R = 15 ms) A 250 500 640 100 1600 2520 2520
Rated operating current I
e
at DC-23A A 63 125 160 250 400 630 630
Rated short-time current (1-s current) A (RMS value) 2.5 3.2 3.2 8 11 32 32
Technical data: Switch disconnectors 3KL/3KM
The complete
series of
SENTRON
switch discon-
nectors with
fuses: 3KL,
3KM and the
rotary door-
coupling drive
mechanism
8UC.